sort the point list after using kangaroo

Hello, I was confused that after I use kangaroo for form finding, all the points of the original surface are randomly listed. and I could only reconstruct a mesh surface but not a nurb surface like the original surface anymore. 

the form is a little bit complex, so I was not able to sort the point list just by their coordinates. Is there a way to make a correct list after kangaroo? Then I can edit the nurb surface again.

I also did search for some Infos on the website but no good result...If anyone could help me with the problem I will be really appreciate!